mirror of
https://github.com/qbittorrent/qBittorrent
synced 2025-07-06 05:01:25 -07:00
f51ad39ad9
`getrandom()` is available since Linux 3.17 (2014/10/05) yet there are older devices that don't meet this requirement. Closes #22691. PR #22723.
77 lines
2.5 KiB
C++
77 lines
2.5 KiB
C++
/*
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* Bittorrent Client using Qt and libtorrent.
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* Copyright (C) 2024 Mike Tzou (Chocobo1)
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*
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* In addition, as a special exception, the copyright holders give permission to
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* link this program with the OpenSSL project's "OpenSSL" library (or with
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* modified versions of it that use the same license as the "OpenSSL" library),
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* and distribute the linked executables. You must obey the GNU General Public
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* License in all respects for all of the code used other than "OpenSSL". If you
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* modify file(s), you may extend this exception to your version of the file(s),
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* but you are not obligated to do so. If you do not wish to do so, delete this
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* exception statement from your version.
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*/
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#include <limits>
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#include <windows.h>
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#include <QtLogging>
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#include "base/global.h"
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#include "base/utils/os.h"
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namespace
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{
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class RandomLayer
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{
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// need to satisfy UniformRandomBitGenerator requirements
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public:
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using result_type = uint32_t;
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RandomLayer()
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: m_processPrng {Utils::OS::loadWinAPI<PPROCESSPRNG>(u"BCryptPrimitives.dll"_s, "ProcessPrng")}
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{
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if (!m_processPrng)
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qFatal("Failed to load ProcessPrng().");
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}
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static constexpr result_type min()
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{
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return std::numeric_limits<result_type>::min();
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}
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static constexpr result_type max()
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{
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return std::numeric_limits<result_type>::max();
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}
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result_type operator()() const
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{
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result_type buf = 0;
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const bool result = m_processPrng(reinterpret_cast<PBYTE>(&buf), sizeof(buf));
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if (!result)
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qFatal("ProcessPrng() failed.");
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return buf;
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}
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private:
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using PPROCESSPRNG = BOOL (WINAPI *)(PBYTE, SIZE_T);
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const PPROCESSPRNG m_processPrng = nullptr;
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};
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}
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